"All Strider Knives carry an unconditional, lifetime guarantee. In addition, our knives will be resharpened, refinished, and rewrapped as often as needed at no cost to you other than return postage. -Semper Fi"
That is their warranty. I am not, repeat not, a Strider Rep., but I believe that "unconditional, lifetime guarantee" means anything goes. These guys know that knives have to be cleaned once in a while, or the wife will throw it out for smelling like fish and moldy cheese. They were designed for hardcore people, and those kind have a tendency to be in the mud and muck. I don't believe it will do anything to the terms of the warranty, and it will improve the knife performance.
Take it easy,
Reed